[GR-58041] Use mx 7.30.0. #19186

Job	Run time
/substratevm on Windows	7m 20s
/compiler style,fullbuild,test JDK21	27m 29s
/compiler build,bootstraplite JDKlatest	4m 12s
/espresso style,fullbuild JDK21	12m 29s
/substratevm style,fullbuild JDK21	10m 30s
/substratevm build,helloworld,native_unittests JDKlatest	19m 11s
/substratevm build,debuginfotest JDKlatest	8m 7s
/substratevm hellomodule JDKlatest	4m 45s
/sulong style,fullbuild,sulongBasic JDK21	20m 9s
/truffle JDK21	27m 26s
/vm build,sulong JDKlatest	26m 28s
/vm build JDKlatest	15m 30s
	3h 3m 36s

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